Mold for concrete culverts.



T. B. AIBERCR( )MBIEc MOLDFOR CONCRETE GULVERTS. APPLICATION FILED JULY 30, 1908.

Patented May 11, 1909.

THE NORRIS PETERS ca., wasnmcmu. n c.

UNTT STArl ajIENT FFTQE.

THOMAS B. ABERCROMBIE, OF WELDON, IOWA.

MOLD FOR CONCRETE OULVERTS.

T all whom it may concern:

Be it known that I, THOMAS E. ABER- CROMBlE, a citizen of the United States, residing at Weldon, in the county of Decatur and State of Iowa, have invented a certain new and useful Mold for Concrete Culverts,

of which the following is a specification.

The object of my invention is to provide a mold of simple, durable and inexpensive construction, especially'adapted for use in forming concrete culverts of comparatively great length and small diameter, said mold being so arranged that after the culvert is formed the entire mold may be quickly and easily removed from the culvert without the necessity of an operator getting inside of the culvert, and further to provide a mold of this kind that may be readily, quickly and easily set up for use after it has been withdrawn from a culvert.

My invention consists in the construction, arrangement and combination of the various parts of the device whereby the objects contemplated are attained hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawingsfin which- Figure 1 shows a longitudinal sectional view through a mold embodying my invention. Fig. 2 shows a detail plan View of the abutting ends of the brace rings, the movable member of one end being shown in position for withdrawing the ring from a culvert. F 3 shows a transverse sectional view of a mold embodying my invention with the edges of the mold proper in overlapping positions. Fig. t shows a like view with the edges of the mold proper being shown in engagement with each other. Fig. 5 shows an end view of the mold without the supporting rings in a partially collapsed position, and Fig. 6 shows a perspective view of one of the mold bracing rings.

Referring to the accompanying drawings, the mold is composed of a number of supporting rings and a number of mold sections. Each supporting ring comprises two semi-circular members 10 and 11, one end of each member being connected by the hinge 12. On the other end of the member 11 is a lug l3 and on the other end of the member 10 is an extension 14 pivotally connected with the part 10 by the pin 15. This extension 14 is provided with a lug 16 of greater length than the lug l3 and having an opening 17 therein to receive a rod or Specification of Letters Patent.

Application filed July 30, 1908.

Patented May 11, 1909.

Serial No. 4%,095.

wire 18. The end of the part 10 to which the extension is pivoted is preferably round at 19 as shown in Fig. 2 and the lug 16 is also preferably round as shown in Fig. 2. I also provide two mold members, each of which consists of two segmental body portions 20 connected by a hinge 21. These body portions may be made of any desired material. I prefer, however, to' make them of sheet metal and when so made they can be used in forming culverts of different diameters. When they are used as shown in Fig. 4 with the edges of the sections in engagement with each other, then a culvert may be made of the maximum diameter. If it is desired to make a culvert of less diameter, the ends of the parts 20 may be placed in overlapping positions as shown in Fig. 3 and the sheet metal may be bent to form a round culvert.

In use I first place the supporting rings in position with the lugs 16 and 17 thereof in engagement with each other. Then the culvert members 20 are placed in position with their abutting ends arranged at the central portions of the supporting rings as shown in Fig. 1. All of the lugs 14 are connected by means of rods 18. Then the 0011- crete may be placed in position and after it has sufi iciently set and hardened the operator may, by pulling upon one end of the Wire 18, first move all of the lugs 14: to position at rightangles to the ring sections 10. When this is done, the section 11 will move toward the section 10 and thus the diameter of the rings will be reduced to such an extent that they may be bodily withdrawn from the interior of the mold by the wire 18. Then when this is done the sections 20 will no longer be supported by the rings and hence they will collapse and fall into the center of the culvert from which they may be easily withdrawn.

I claim as my invention.

1. An improved collapsible culvert, comprising a supporting ring formed of two sections hinged together, a pivoted exten sion on the free end of one section designed whenin one position to engage the free end of the other section, and designed when in another position to stand clear of the free end of the other section to permit the ring to collapse, and two mold sections, each comprising two segmental body portions hinged together. r

2. In a device of the class described, the

combination of a number of mold sections each comprising two segmental body portions hinged together and a number of supporting rings, each comprising two segmental members hinged together, an extension pivoted to the free end of one member of each ring, said supporting rings being designed to engage the inner surfaces of the mold members at the point where the ends thereof engage each other, and means for connecting all of the said extensions for turning them at right-angles to the ring members to which they are pivoted.

In a device of the class described, the combination of a number of mold sections, each comprising two segmental members hinged together and a supporting ring formed of two segmental members hinged together, a lug fixed to the free end of one of said members, and a pivoted extension at the ree end of the other member, said extension having a lug thereon of greater length than the aforesaid lug, and the end of the member to which the extension is pivoted being rounded, said extension being providetlwith a shoulder to engage said rounded end, and a rod connected to the lug of said extension for the purposes stated.

Des Moines, Iowa, July 9, 1908.

lI-I()l=lAS B. ABERCROMBI \Vitnesses E. A. Loonwoon,

J. D. HIoKs. 

